尝试覆盖 !important 样式时遇到问题

Question

My goal is to make the fields for filling out an ecommerce checkout address appear after the user starts typing the zip code.

For that, I wrote this JS code below

<script>


window.onload = function(){
    document.getElementById('billing_postcode').onclick = function(){
    //console.log('Hello world');
   
document.getElementById('billing_address_1_field').element.style.setProperty("display", "block", "important");

document.getElementById('billing_address_2_field').element.style.setProperty("display", "block", "important");

document.getElementById('billing_billing_number_field').element.style.setProperty("display", "block", "important");

document.getElementById('billing_city_field').element.style.setProperty("display", "block", "important");

document.getElementById('billing_state_field').element.style.setProperty("display", "block", "important");
  }
}



</script>   

And this is the CSS I need to overwrite

#billing_address_1_field {
    display: none !important;
}

#billing_address_2_field{
    display: none !important;
}

#billing_billing_number_field{
    display: none !important;
}

#billing_city_field{
    display: none !important;
}

#billing_state_field{
    display: none !important;
}

I'm getting this error on the console

Uncaught TypeError: Cannot read property 'style' of undefined
    at HTMLInputElement.document.getElementById.onclick ((index):384)
document.getElementById.onclick @ (index):384

Thank you in advance for your help!

Answer 1

Perhaps try removing the 'element' from each of the 'setProperty' statements. ie: document.getElementById('billing_state_field').style.setProperty("display", "block", "important");